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ISA RP75.21-1989 (R1996)

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Process Data Presentation for Control Valves
standard by The International Society of Automation, 04/01/1989

Description

Describes a technique for communication of process data and other requirements between process system designer or the user and the valve supplier to facilitate the selection of control valve actuators and accessories. The technique includes such features as the process data envelope, process schematic, piping configuration and process data worksheet.